MBR540MFST1G Equivalent & Substitute Parts

Part Overview

The MBR540MFST1G is a Schottky rectifier diode manufactured by onsemi, rated for 40 V DC reverse voltage and 5 A average rectified current. The device is housed in a 5-DFN (5x6) surface mount package with 5 leads and features fast recovery characteristics suitable for high-frequency switching applications.

The MBR540MFST1G is classified as obsolete. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production builds and field replacements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	5 A
Voltage - Forward (Vf) (Max) @ If	580 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	2 mA @ 40 V
Mounting Type	Surface Mount
Package / Case	8-PowerTDFN, 5 Leads
Supplier Device Package	5-DFN (5x6) (8-SOFL)
Operating Temperature - Junction	-40°C ~ 175°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitution of the MBR540MFST1G is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 5 A
Voltage - Forward (Vf) (Max) @ If: 580 mV @ 5 A
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: 2 mA @ 40 V

Mechanical Parameters:

Mounting Type: Surface Mount
Package / Case: 8-PowerTDFN, 5 Leads
Supplier Device Package: 5-DFN (5x6) (8-SOFL)
Operating Temperature - Junction: -40°C ~ 175°C

Compliance Parameters:

Technology: Schottky
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

Substitute parts must match all electrical specifications, package configuration, and compliance certifications to ensure direct interchangeability without circuit modification.

Parameter Comparison

Parameter	MBR540MFST1G	NRVB540MFST1G
Manufacturer	onsemi	onsemi
Category	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V
Current - Average Rectified (Io)	5 A	5 A
Voltage - Forward (Vf) (Max) @ If	580 mV @ 5 A	580 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	2 mA @ 40 V	2 mA @ 40 V
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-PowerTDFN, 5 Leads	8-PowerTDFN, 5 Leads
Supplier Device Package	5-DFN (5x6) (8-SOFL)	5-DFN (5x6) (8-SOFL)
Operating Temperature - Junction	-40°C ~ 175°C	-40°C ~ 175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The NRVB540MFST1G is a direct parametric equivalent to the MBR540MFST1G. Both devices are manufactured by onsemi and share identical electrical specifications, package configuration, and compliance certifications.

The primary distinction between the two parts is product status: the MBR540MFST1G is obsolete, while the NRVB540MFST1G maintains active product status. The NRVB540MFST1G is available in Tape & Reel (TR) packaging format with significantly higher inventory availability (4600 units in stock versus 1097 units for the obsolete variant).

For new designs and production applications, the NRVB540MFST1G is the appropriate selection. Both parts satisfy ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity requirements. No circuit modifications or design changes are required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can the NRVB540MFST1G be used as a direct replacement for the MBR540MFST1G?

A: Yes. The NRVB540MFST1G is a direct parametric equivalent. All electrical specifications, including reverse voltage rating (40 V), average rectified current (5 A), forward voltage drop (580 mV @ 5 A), and reverse leakage current (2 mA @ 40 V) are identical. The package configuration (5-DFN, 5x6) and operating temperature range (-40°C to 175°C) are also identical. No circuit modifications are required.

Q: What is the difference between MBR540MFST1G and NRVB540MFST1G?

A: The primary differences are product status and packaging format. The MBR540MFST1G is classified as obsolete, while the NRVB540MFST1G is active. The NRVB540MFST1G is supplied in Tape & Reel (TR) format, whereas the MBR540MFST1G packaging format is not specified. All electrical and mechanical parameters are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the MBR540MFST1G and NRVB540MFST1G are ROHS3 compliant and REACH unaffected. Both parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life under standard storage conditions.

Q: What is the package type for these diodes?

A: Both parts use the 5-DFN (5x6) surface mount package with 5 leads, designated as 8-PowerTDFN. This is a compact surface mount package suitable for high-density PCB layouts.

Q: Can these parts be used in high-frequency switching applications?

A: Yes. Both devices feature fast recovery characteristics (≤ 500 ns for currents > 200 mA), making them suitable for high-frequency rectification and switching applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message